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Appliance tip of the week...

Refrigerator Defrost Drain Clogged

The part(s) or condition(s) listed below for the symptom Refrigerator defrost drain clogged are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Clogged or Freezing Defrost Drain

The defrost drain might be clogged or frozen. If the defrost drain is frozen, the water will overflow the drain trough and drip down to the bottom of the compartment. If the defrost drain is frozen, thaw it out and ensure that the drain is clear of debris.

Drain Strap

Some defrost drains are outfitted with a drain strap. The drain strap is a small piece of copper or aluminum that attaches to the defrost heater and extends partway into the defrost drain. When the defrost heater turns on, heat is conducted through the drain strap to melt away any ice that may have accumulated further down in the defrost drain. If the drain strap is not in place, the defrost drain may be more likely to freeze over.

Drain Heater

Some refrigerators are equipped with drain heaters. Drain heaters prevent the water in the drain pan from re-freezing and clogging the defrost drain. If your drain heater is defective or is not in the proper position, the defrost drain might freeze over.

Appliance tip of the week - part deux...

Most Frequent Causes for Refrigerator freezing food

The part(s) or condition(s) listed below for the symptom Refrigerator freezing food are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Temperature Control Thermostat

The temperature control thermostat directs voltage to the compressor, evaporator fan motor, and condenser fan motor (if applicable). If the temperature control thermostat is not working properly, it may cause the refrigerant system to run longer than necessary. As a result, the refrigerator will be too cold. To determine if the thermostat is defective, rotate the thermostat from the lowest setting to the highest setting and listen for a click. If the thermostat clicks, it is not likely defective. If the thermostat does not click, use a multimeter to test the thermostat for continuity. If the temperature control thermostat does not have continuity at any setting, replace it.

Thermistor

The thermistor monitors the air temperature and sends the temperature reading to the control board. The control board then regulates power to the compressor and evaporator fan based on the thermistor readings. If the thermistor is defective, the compressor and evaporator fan may run too frequently. As a result, the refrigerator will be too cool. To determine if the thermistor is defective, test it with a multimeter. The thermistor resistance should change in conjunction with the refrigerator temperature. If the thermistor resistance does not change, or the thermistor does not have continuity, replace the thermistor.

Temperature Control Board

The temperature control board provides voltage to the compressor and fan motors. If the control board is faulty, it may send continuous voltage to the compressor or fan motors. As a result, the refrigerator will be too cool. Control boards are often misdiagnosed—before replacing the control board, first test all of the more commonly defective components. If none of the other components are defective, consider replacing the temperature control board.

Main Control Board

The main control board might be defective. However, the control board is very rarely the cause of the problem. Before replacing the control board, first test all of the more commonly defective components. If none of these components are defective, consider replacing the main control board.

Damper Control Assembly

The air damper control opens and closes to let the proper amount of cold air into the refrigerator compartment. If the damper does not close properly, it will let too much cold air into the refrigerator. Check the damper control to determine if it is broken or stuck open.

Damper

The damper opens and closes to let the proper amount of cold air into the refrigerator compartment. If the damper is stuck open, it will let too much cold air into the refrigerator. As a result, the refrigerator will be too cold. Check the damper to determine if it is broken or stuck open.

Fridge-Aid deodorizer

Fridge-Aid deodorizer

This drawer liner improves the air flow in crisper drawers. The open cell design helps keep fruits and vegetables fresh longer

This drawer liner improves the air flow in crisper drawers. The open cell design helps keep fruits and vegetables fresh longer

Plastic Liner Repair Kit

Plastic Liner Repair Kit

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